const name='Tom'
const age=12
function student(){
	console.log('I my a student ')
}
export default{
	name,age,student
}
//默认导出 默认导出是不允许有重复
 export let mo0='按需导出0'
 export let mo1='按需导出1'
 export let mo2='按需导出2'
//按需导出允许多个
//按需导出和默认导出不冲突
//只能有一个export default